* {
    margin: 0;
    padding: 0;
}

body {
    height: 100vh;
    background: linear-gradient(to bottom, #89f7fe, #66a6ff);
}

.wave {
    width: 200px;
    height: 200px;
    background-color: #2797e7;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 50px rbga(255, 255, 255, 0.2);
    overflow: hidden;
    &:before {
        content: '';
        width: 300px;
        height: 300px;
        background-color: rgba(255, 255, 255, 0.8);
        position: absolute;
        left: 50%;
        top: 0;
        transform: translate(-50%, -65%);
        border-radius: 40%;
        animation: wave 2s linear infinite;
    }
    &::after {
        content: '加载中...';
        position: absolute;
        left: 50%;
        top: 0;
        font-size: 24px;
        transform: translate(-50%, 40px);
        color: #2797e7;
    }
}

@keyframes wave {
    100% {
        transform: translate(-50%, -65%) rotate(360deg);
    }
}
